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微流控芯片中交流电渗流、电热效应及自然对流的比较分析

发表时间:2014-08-15  浏览量:1599  下载量:462
全部作者: 张峰,陈瀚
作者单位: 华中科技大学土木工程与力学学院;华中科技大学数字制造装备与技术国家重点实验室
摘 要: 研究不同实验参数条件下,交流电渗流(alternating current electroosmosis, ACEO)、电热效应(electrothermal effect, ETE)和自然对流引起微流控芯片中流场特性。首先对ACEO引起的微电极表面滑移速度和ETE造成的流场体积力分别进行量级分析,并采用数值模拟方法研究不同参数条件下ACEO,ETE及自然对流对流场的影响,讨论3种效应在不同条件下造成流场的大小关系,得出自然对流在一般实验条件下可以忽略的结论。
关 键 词: 流体力学;交流电渗流;电热效应;自然对流
Title: Comparative analysis of alternating current electroosmosis, electrothermal effect and natural convection in microfluidic chips
Author: ZHANG Feng, CHEN Han
Organization: School of Civil Engineering & Mechanics, Huazhong University of Science and Technology; State Key Lab of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology
Abstract: In this paper, the flow fields in microfluidic devices caused by alternating current electroosmosis (ACEO), electrothermal effect (ETE) and natural convection are investigated under various experimental parameters. The slip velocity on micro electrodes caused by ACEO and fluid volumetric force caused by ETE are firstly studied analytically. Then, numerical simulation is conducted to study the effects of ACEO, ETE and natural convection on the flow fields in microfluidic devices under various experimental parameters, and their relative importance is also analyzed. The conclusion is drawn that natural convection can be neglected under normal experimental conditions.
Key words: fluid mechanics; alternating current electroosmosis; electrothermal effect; natural convection
发表期数: 2014年8月第15期
引用格式: 张峰,陈瀚. 微流控芯片中交流电渗流、电热效应及自然对流的比较分析[J]. 中国科技论文在线精品论文,2014,7(15):1508-1518.
 
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